I was just curious about the use of IFE in the core plugins. Since using
them as examples I felt the need to continue the style. However looking at
how modules are handled in TiddlyWiki it seems that an IIFE might be
redundant.
For example:
/*\
title: $:/plugins/my-plugin/plugin.js
type: application/javascript
module-type: startup
An example startup plugin
\*/
(function() {
exports.startup = function startup() {
// Do stuff
}
})();
Since TiddlyWiki wraps code in a sandbox in order to manage the exports
variable would it not be scoped in it's own *context*? Wouldn't this
wrapping mean the (function() {…})() is redundant?
This became a point of question for me while I was using Babel
<https://babeljs.io/> which transpiles ES2015 (ES6) modules into CommonJS
(which the TiddlyWiki code *mostly* emulates). But unlike CoffeeScript it's
output doesn't warp inside an IIFE. This is because Babel assumes that the
files it outputs will be bundled with a module system like Browserify or
AMD. TittleWiki is that bundling system using it's sandbox to evaluate
plugin tiddlers.
For completeness the above code would look like this in ES2015:
/*\
title: $:/plugins/my-plugin/plugin.js
type: application/javascript
module-type: startup
An example startup plugin
\*/
export function startup() {
// Do stuff
}
Which outputs a file like:
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.startup = startup;
/*\
title: $:/plugins/my-plugin/plugin.js
type: application/javascript
module-type: startup
An example startup plugin
\*/
function startup() {
// Do stuff
}
So would this cause a startup function to be global? Or is the sandbox
enough to prevent global pollution? And in the case of the later what is
the benefit (if any) of wrapping the core code in IIFEs?
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